This grower is sure of this plant identification.
Anaphalis margaritacea (Pearl everlasting). This perennial will produce dense corymbs of small white flowers with yellow centres which bloom in late summer. The leaves are lance-shaped and have white woolly undersides which give a silvery-grey effect.
It has a bushy habit and will prefer a sunny position with well drained, but moist soil.
Borders. Summer interest. A good flower for cutting and drying.